package com.chen.rabbitmq.config;

import org.springframework.amqp.core.Binding;
import org.springframework.amqp.core.BindingBuilder;
import org.springframework.amqp.core.CustomExchange;
import org.springframework.amqp.core.Queue;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.util.HashMap;
import java.util.Map;


/**
 * @author Y·C
 * @version 1.0.0
 * @ClassName DelayedQueueConfig.java
 * @Description 基于插件的延迟消息队列配置
 * @createTime 2023年05月12日 20:38:00
 */

@Configuration
public class DelayedQueueConfig {

    //交换机
    public static final String DELAYED_QUEUE_NAME = "delayed.queue";
    //队列
    public static final String DELAYED_EXCHANGE_NAME = "delayed.exchange";
    //routingKey
    public static final String DELAYED_ROUTING_KEY = "delayed.routingkey";


    //声明一个队列
    @Bean
    public Queue delayedQueue(){
        return new Queue(DELAYED_QUEUE_NAME);
    }

    //声明交换机 基于插件
    @Bean
    public CustomExchange delayedExchange(){

        Map<String,Object> arguments = new HashMap<>();
        arguments.put("x-delayed-type","direct");
        /**
         * 1.交换机的名称
         * 2.交换机的类型
         * 3.是否需要持久化
         * 4.是否需要自动删除
         * 5.其他的参数
         * */
        return new CustomExchange(DELAYED_EXCHANGE_NAME,"x-delayed-message",true,
                false,arguments);
    }

    //绑定交换机和队列
    @Bean
    public Binding delayedQueueBindingDelayedExchange(@Qualifier("delayedQueue") Queue delayedQueue,
                                                      @Qualifier("delayedExchange") CustomExchange delayExchange){

        return BindingBuilder.bind(delayedQueue).to(delayExchange).with(DELAYED_ROUTING_KEY).noargs();
    }
}
